2-Pentanone, 5-chloro- → 2-(4-Oxopentyl)-1H-isoindole-1,3(2H)-dione

HRID 1167679

Reaction equation

HRID 1167679 reaction equation
[C:1]1(=[O:11])[NH:5][C:4](=[O:6])[C:3]2=[CH:7][CH:8]=[CH:9][CH:10]=[C:2]12.[K].Cl[CH2:14][CH2:15][CH2:16][C:17](=[O:19])[CH3:18]>CN(C=O)C>[O:19]=[C:17]([CH3:18])[CH2:16][CH2:15][CH2:14][N:5]1[C:1](=[O:11])[C:2]2[C:3](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:4]1=[O:6]

Participants

4

Reactant 2

HCID 799932-Pentanone, 5-chloro-HCID 24194345Phthalimide potassium salt

Product 1

HCID 2362702-(4-Oxopentyl)-1H-isoindole-1,3(2H)-dioneYield 34.1%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
60 °C

Procedure

24.59 g (132.8 mmol) of potassium phthalimide are added to a solution of 14.3 ml (124.4 mmol) of 5-chloro-2-pentanone in 100 ml of DMF and the mixture is left to stir at room temperature for 3 h and at 60° C. for 30 h. After filtering, the filtrate is partitioned between water and dichloromethane. The phases are separated and the organic phase is washed successively with water, twice with an 0.2N solution of NaOH and water and then dried over sodium sulfate. After filtering, the solvent is removed in vacuo and the residue is chromatographed through silica gel using heptane/ethyl acetate=6/4. 9.8 g (34%) of (14.1) are obtained after concentrating the product fractions.

Workup

  1. waitthe mixture is left
  2. filtrationAfter filtering
  3. customthe filtrate is partitioned between water and dichloromethane
  4. customThe phases are separated
  5. washthe organic phase is washed successively with water, twice with an 0.2N solution of NaOH and water
  6. dry with materialdried over sodium sulfate
  7. filtrationAfter filtering
  8. customthe solvent is removed in vacuo
  9. customthe residue is chromatographed through silica gel

Sources & evidence

ORD record
ord-cd52f2e0e7e4457bba7ef326bbecbbb8
Source dataset
uspto-grants-2003_09
Patent number
US06620820B2

Linked notes

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